Abstract
We report on the BCC to FCC/HCP structural transformation of Co 70 Fe 30 alloy produced by room temperature ion irradiation of Co 70 Fe 30 /Cu discontinuous multilayers. The structural changes were analyzed by X-ray diffraction and X-ray absorption spectroscopy. For this study, two different samples were examined, one irradiated with 50 keV He + and another with 600 keV Kr + with doses of 1×10 17 and 3×10 15 ions/cm 2 , respectively. No substantial change is observed after He + irradiation, while after Kr + irradiation an unexpected structural transition from BCC to FCC/HCP closed packed of the Co 70 Fe 30 alloy was found.
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